Who are these Game of Thrones "Summer is here" characters?

Question

I recently saw this awesome image by artist Tim Hamilton (@T1mco)

_{[src: http://t1mco.tumblr.com/post/90437781995]}

I'm interested to know if anyone can help me figure out who is in the photo? There are some who are clearly obvious, but some which are not.

Who are these Game of Thrones (ASOIAF) characters?

Answer 1

From foreground to background, then left to right:

This side of the pool

• Ned and Cat taking some rest. Ned appears to be drinking Red Stripe; presumably Newky Brown Ale wasn't an option
• Cersei and Jaime on a date. Cersei's glammed up in a red dress and looks to be on her second bottle of wine already, Jaime's posing in a designer polo shirt.

In the pool

• Robb and [Talisa/Jeyne Westerling] play with Grey Wind, with two unidentifiable characters. Based on how other characters cluster and interact in this image, I'd guess it's Theon awkwardly being the couple's third wheel and [Asha/Yara] swimming over to stop him making a nuisance of himself.
• Bran riding Hodor plays with Rickon and Shaggydog, while Summer, Jojen and Meera watch
• Jon, Ygritte, Gendry and Hot Pie try to dodge Arya cannonballing into the pool
• Gilly, holding what is presumably her baby, chats to a blushing Sam, while Nymeria and Ghost sit by the side of the pool watching their humans foolishly playing, wearing what look like expressions of wolfish disdain

On the path around the pool

• Gregor sits and eats, not caring that he's in the way of anyone trying to walk past

Behind that path

• Loras chats to a blushing Sansa while Margaery does her hair and half-listens to a scowling Joffrey. Lady takes a nap
• Olena and Twyin relax and watch the silly oafs at play while smirking from some shade, presumably giving some shade of their own
• Sandor lies back and relaxes, while keeping an eye on Gregor. I think it's Sandor since there seems to be the burnt gap in his hair, but he looks a bit skinny for Sandor. It could also be Bronn with a side parting, sitting near Tyrion but not getting involved in Tyrion's family stuff
• Tyrion makes a big show of giving food to Tommen and Myrcella, while Shae does all the hard work. [credit to SystemDown] Tommen's cats, Ser Pounce and Balerion, are skulking by Tommen's feet, clearly aware it's meal time.

Beyond the Wall

• Oberyn and Ellaria take a romantic stroll
• Varys, holding what looks like a little bird, and presumably Littlefinger take a stroll, though the likeness isn't clear this far out. It's possibly a better likeness for Illyrio Mopatis with Varys, which would make sense, but would leave us with the (always worrying) question, where is Littlefinger and what is he up to? The guy on the sunlounger near Tywin could be Littlefinger from his build and face, and it'd make sense for him to be near but not with the other arch-schemers, but the hair's not right.
• Jorah (presumably, though the likeness isn't clear this far out) follows behind Dany, loyally carrying all her stuff while she ignores him and chats to other people
• Dany strolls and chats with Jhiqui (darker) and Irri (lighter). I'm assuming it's them, because no other pair of Dany's female companions are close enough that you'd expect them to walk arm in arm like this. It is known.